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Blade Maintenance
Checking for a Bent Blade
After striking a foreign object, inspect the machine
for damage and make repairs before restarting and
operating the equipment. Torque all the spindle pulley
nuts to 176 to 203 N-m (130 to 150 ft-lb).
1.
Position the machine on a level surface. Raise
the cutting unit, engage the parking brake, put
the traction pedal in neutral, put the PTO lever
in the Off position, stop the engine, and remove
the ignition key. Block the cutting unit to prevent
it from accidentally falling.
2.
Rotate the blade until the ends face forward and
backward
(Figure
of the cutting unit to the cutting edge at the front
of the blade. Remember this dimension.
Figure 111
3.
Rotate the opposite end of the blade forward.
Measure between the cutting unit and cutting
edge of the blade at the same position as in
step 2. The difference between the dimensions
obtained in steps
3 mm (1/8 inch). If the dimension exceeds 3
mm (1/8 inch), the blade is bent and must be
replaced; refer to Removing and Installing the
Cutter Blade.
Removing and Installing
the Cutter Blade(s)
The blade must be replaced if a solid object is hit,
the blade is out of balance, or if the blade is bent.
Always use genuine Toro replacement blades to be
sure of safety and optimum performance. Never use
replacement blades made by other manufacturers
because they could be dangerous.
1.
Raise the cutting unit to the highest position,
engage the parking brake, stop the engine, and
remove the ignition key. Block the cutting unit to
prevent it from accidentally falling.
2.
Grasp the end of the blade using a rag or thickly
padded glove. Remove the blade bolt, anti-scalp
cup, and blade from the spindle shaft
112).
3.
Install the blade, anti-scalp cup, and blade bolt.
Tighten the blade bolt to 115 to 149 N-m (85 to
110 ft-lb).
111). Measure from the inside
2
and
3
must not exceed
(Figure
Important:
must be pointing toward the inside of the
cutting unit to ensure proper cutting.
Note:
After striking a foreign object, torque all
the spindle pulley nuts to 115 to 149 N-m (85
to 110 ft-lb).
1. Blade bolt
Inspecting and Sharpening
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the Cutter Blade(s)
DANGER
A worn or damaged blade can break, and
a piece of the blade could be thrown into
the operator's or bystander's area, resulting
in serious personal injury or death. Trying
to repair a damaged blade may result in
discontinued safety certification of the
product.
• Inspect the blade periodically for wear or
damage.
• Never try to straighten a blade that is bent
or weld a broken or cracked blade.
• Replace a worn or damaged blade.
Two areas must be considered when checking and
servicing the cutter blade-the sail and the cutting
edge. Both cutting edges and the sail, which is the
turned up portion opposite the cutting edge, contribute
to a good quality-of-cut. The sail is important because
it lifts the grass up straight, thereby producing an
even cut. However, the sail will gradually wear down
during operation, and this condition is normal. As
the sail wears down, the quality-of-cut will degrade
somewhat, although the cutting edges are sharp.
The cutting edge of the blade must be sharp so that
the grass is cut rather than torn. A dull cutting edge
is evident when the tips of the grass appear brown
and shredded. Sharpen the cutting edges to correct
this condition.
70
The curved part of the blade
Figure 112
2. Anti-scalp cup
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